Abstract
Abstract In the present work, the prediction of residual stresses and distortion due to GTA welding process, a Finite Element (FE)Method has been developed and applied. Stainless steel plate of 3mm thickness is taken for the analysis. The prediction of residual stresses and distortion is performed by thermal and mechanical analysis that is sequentially coupled. The thermal analysis and mechanical analysis of the plate subjected to heat source movement have been studied consecutively. The FE analysis is performed in ANSYS software. In transient thermal analysis, Gaussian distribution model has been used for heat input of the arc. During modeling, the physical and mechanical properties that depend on temperature are considered. The heat transfer losses through all the three mechanisms are incorporated. For validating the FE simulated analysis, an experiment is conducted. The predicted thermal histories are very close agreement with measured thermocouple readings. After validation of thermal analysis results, the transient thermal histories are used as input for further mechanical analysis to simulate. The large displacement theory is used to conduct mechanical analysis. The effect of constraints on distortion and residual stresses are numerically studied. The predicted stresses and distortion results of different cases are discussed and presented.
Highlights
In the present work, the prediction of residual stresses and distortion due to Gas Tungsten Arc (GTA) welding process, a Finite Element (FE) Method has been developed and applied
The FE analysis is performed in ANSYS software
The results with discussion pertaining to the prediction of temperature, residual stress and distortion are described in following stages
Summary
Abstract: In the present work, the prediction of residual stresses and distortion due to GTA welding process, a Finite Element (FE) Method has been developed and applied. The prediction of residual stresses and distortion is performed by thermal and mechanical analysis that is sequentially coupled. The thermal analysis and mechanical analysis of the plate subjected to heat source movement have been studied consecutively. Gaussian distribution model has been used for heat input of the arc. For validating the FE simulated analysis, an experiment is conducted. After validation of thermal analysis results, the transient thermal histories are used as input for further mechanical analysis to simulate. The effect of constraints on distortion and residual stresses are numerically studied. The predicted stresses and distortion results of different cases are discussed and presented
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